Hi Evan!
The plants are naturalized in the Wa'a Wa'a Kipuka.
Photos from the Kipuka were used several years ago, where the late Steve Lucas and I presented information to John Weirsma of GRIN (USDA Plants) to show a distinct difference between E. aureum & E. pinnatum. That prompted GRIN to list the plants as separate species.
The Kipuka houses many native plants, Polynesian introductions, modern introductions, and aliens.
A hui hou aloha, Dave
